Backpack



FIG. 1 is a front perspective view of a backpack;

FIG. 2 is a front view of the backpack of FIG. 1;

FIG. 3 is a rear view of the backpack of FIG. 1;

FIG. 4 is a left side view of the backpack of FIG. 1;

FIG. 5 is a right side view of the backpack of FIG. 1;

FIG. 6 is a top view of the backpack of FIG. 1; and,

FIG. 7 is a bottom view of the backpack of FIG. 1.

The claim is directed to all of the solid lines shown and to allsurfaces shown with contour line shading. All other lines and surfaces,including all of the broken lines illustrating portions of the backpackand all surfaces shown without line shading form no part of the claimeddesign.

CLAIM The ornamental design for a backpack, as shown and described.